X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.3.6) with ESMTP id 620182 for flyrotary@lancaironline.net; Sat, 30 Jul 2005 17:03:57 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.73; envelope-from=ceengland@bellsouth.net Received: from ibm69aec.bellsouth.net ([209.215.61.37]) by imf25aec.mail.bellsouth.net with ESMTP id <20050730210313.HSNG2986.imf25aec.mail.bellsouth.net@ibm69aec.bellsouth.net> for ; Sat, 30 Jul 2005 17:03:13 -0400 Received: from [127.0.0.1] (really [209.215.61.37]) by ibm69aec.bellsouth.net with ESMTP id <20050730210311.JHNA24175.ibm69aec.bellsouth.net@[127.0.0.1]> for ; Sat, 30 Jul 2005 17:03:11 -0400 Message-ID: <42EBEB0B.5020005@bellsouth.net> Date: Sat, 30 Jul 2005 16:03:07 -0500 From: Charlie England User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Too rich, no start References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit WALTER B KERR wrote: > > > On Sat, 30 Jul 2005 14:03:30 -0400 "Ed Anderson" > > writes: > > Bernie, > > My fuel system will sometimes hold the fuel pressure for several > days. But, it will always hold the pressure for 30 minutes or > more after turning off the fuel pumps and injectors. So it sure > seems something is continuing to let the fuel into the chamber > after you have turned things off. > > Try this. Place your injectors OFF, turn power to your EC2 OFF. > Turn on your fuel pumps and monitor your fuel pressure. Once it > stabilizes at around 40 psi. Turn off your pumps. Note how long > (quick) it takes the fuel pressure to decay. If it does it in > less than 5 minutes you have a leak. > > =========================================================== > Yea Ed that's what I recall that my pressures stayed up for > hours. Can't turn the EC2 off and run the pumps. My EM2 and EC2 > both power up with engine master. I could turn the engine master > off , run pump, then turn EM2 and EC2 on to see if the pressure > held. This probably does not meet the criteria. What I'm thinking > is that the EC2 is holding the injectors open any time it is on, > but that is a WAG! > > Bernie > Will the controller allow the pumps to run with the injector wires unplugged from the injectors? If so, unplug all 4 at the injectors, run the pumps & do Ed's leakdown test. If it leaks down, either the injectors are stuck or you have a leak somewhere (could simply be the checkvalve in the pump not holding pressure; in that case you haven't really learned anything about your starting problem). If it holds pressure, the injectors are being turned on by either the controller or a short to ground in the injector switch line. This assumes the injectors normally have power applied to them & are triggered by switching the ground side injector wire. Charlie